Sash lock



Mar. 3, 1925.

H. SONNER SASH LOCK Filed 'July 18. 1923 IN VEN TOR HqEEYSONJsmeATTORNEYS WITNESSES Patented Mar. 3, 1925.

PAT T HARRY sormlia, or new YORK, N. Y.

Application filed July 18 -in sash looks.

The principal object of the present inven tion resides in the provisionof means for locking the upper and lower sashes of a window againstrelative movement in a direction to open the same or to effect a furtheropening-thereof if the same are partially open.

As a further object the invention contemplates a sash locking device ofthe character set forth which is extremely simple in its construction,inexpensive to manufacture and install and which is highly efficient andthoroughly reliable in its purpose.

With the above recited and other objects in view the invention residesin the novel construction set forth in the following specification,particularly pointed out in the appended claim and illustrated in theaccompanying drawings, it being understood that the right is reserved toembodiments other than those actually illustrated herein to the fullextent indicated by the general meaning of the terms in which th claimis expressed.

In the drawingsv Figure 1 is a fragmentary vertical sectional viewthrough a window equipped with a sash lock constructed in accordancewith the invention and illustrating the same in locked position.

Fig. 2 is a similar enlarged fragmentary view illustrating respectivelyin full and dotted lines the locked and unlocked positions of the latchmember.

Fig. 3 is av fragmentary front view of the same.

Referring to the drawings by characters of reference A designates theconventional form of window including upper and lower sashes B and C.The sash lock constituting the invention includes a rack bar 10 having aplurality of rack teeth 11 which is preferably secured in a verticalposition on the inner face of one of the side rails D of the upper sash.The pawl or latch 12 which con- LOCK.

1923. Serial n. 652,439.

sists of a flat blade is mounted for pivotal movement in a substantiallyU sliaped base 13. In the preferred embodiment, as illus trated, thepawl is formed with integral laterally projecting t'runni'ons lewhic hare mounted in circular bearing openings15 the side w'alls'16 oftlmU-shaiped base; the said bearing openings having 'commu'nic at ingslots 17 which extend through their for ward end edges to facilitatethe'assembly "of the pawl or latchwith the base. Thebight or connectingweb 18 of the base isapertured to receive therethrough fastening screws19 anchored in the upper'face of the upper or meeting rail of the lowersash. In order to provide" means for normally swinging the pawl or latch12 outwardly to a position for engagingthe teeth 11 of the rackbar, "arearwar'dly projecting arm '20 isprovided on the pawl or men 12to'theeye 21 at the free end of which a. flexible element 22- isconnected and by the free end of which element a weight 23 is carried.The flexible element or core 22 is trained through a guide 24: attachedto the upper portion of the window frame. In order to provide means forholding the pawl or latch in a retracted position out of engagement withthe teeth of the rack bar and against casual movement and at the sametime to limit the forward swinging movement of the same beyond apredetermined angle, a spring 25 is employed, the rear end of whichpasses through an aperture 26 and the bight or connecting web 18 ishooked over the rear end thereof. The major portion of the spring 2:)projects upwardly and forwardly or outwardly at an angle to the bight orweb 18 and passes through an aperture 27 in the pawl or latch with itsouter end turned downwardly as at 28 to engage with and limit theoutward swinging movement of the pawl whereby to prevent swinging of thepawl or latch to a position which would allow for displacement of thetrunnions from the bearing openings 15.

In use and operation of the sash lock, the pawl or latch 12 when swungto a position for engagement with the rack teeth 11 as illustrated inFig.1, positively locks the sashes together against relative movement bya person from the outside to a position to open the window or increasethe opening of the window after the same has been partially opened by aperson from the inside, although the construction admits of the relativemovement of the sashes with respect to each other for closing the windowopening. In this instance the pawl will ratchetover the rack teeth 11 aswill be clearly understood. The device will be found especially usefulto lock the sashes of a window in partially open condition for thepurpose of obtaining ventilation without allowing the gaining of accessfrom the exterior 01' against the possible further opening of the windowby children. The device will also function to lock the sashes incompletely closed condition when desired. The spring will serve toretain the latch or pawl 12 in its retracted position against casualdisplacement but in order to insure against accidental movement of thesame into engagement with the rack teeth the flexible element or cord 22may be engaged in the notch 17 as will be obvious.

I claim:

A device for automatically locking the upper and lower sashes of awindow against relative opening movement from the outside, comprising arack bar secured to the upper sash, and means mounted on top of themeeting rail of the lower sash for selectively engaging the teeth of therack bar,

said means comprising a substantially U- shaped base having its bightportion attached to the top of the meeting rail and having circularbearing openings in the side walls thereof and reduced slotted portionsextending from the circular bearing openings through the outer ends ofthe side walls, a substantially flat latch member having outwardlyprojecting trunnions of a width to snugly operate the bearing openingsand of a thickness to admit of the introduction of the same through theslotted portions, an angularly disposed spring mounted between the sidewalls of the base having a downturned outer terminal, said latch havingan opening receiving said spring and engageable by the terminal to limitthe outward swinging movement of the latch and to prevent turning of thesame to a position to admit of separation ofthe latch from the base,said spring serving to frictionally hold the latch in its engagedrelation to the teeth of the rack bar, and a weighted element connectedwith the latch for normally swinging the same to a position forengagement with the rack teeth.

HARRY SONNER.

